Hertel 30205500 No 54 Circuit Board Drill Bit Solid Carbide

Product Description

The HERTEL 30205500 is a solid carbide circuit board drill bit designed for precision drilling in printed circuit board fabrication and related electronic assembly work. The bit cuts at a wire gauge size of No. 54, corresponding to a decimal diameter of 0.0550 inches (1.40 mm), with a 130-degree drill point angle optimized for clean entry without walking on hard substrates. The fast spiral geometry with a 35-degree helix angle promotes efficient chip evacuation, reducing heat buildup during high-speed spindle operations. A bright polished finish minimizes surface friction throughout the cut.

This drill bit is suited for use in CNC drilling machines and precision drill presses in PCB manufacturing, electronics production, and prototype shops. The tapered web configuration supports accurate hole placement in tight-tolerance layouts. Beyond circuit board work, the solid carbide construction and right-hand cutting direction also make this bit effective in alloy steel, carbon steel, cast iron, high temperature alloy, stainless steel, and titanium applications where a small-diameter, high-rigidity tool is required.

Key Features

• No. 54 wire gauge diameter: 0.0550 inches (1.40 mm) for fine-pitch hole requirements
• 130-degree drill point angle for controlled penetration and minimal substrate delamination
• Solid carbide construction delivers rigidity and wear resistance at small diameters
• Fast spiral with 35-degree helix angle promotes chip clearance in deep or stacked-board drilling
• Tapered web configuration supports point strength and accurate self-centering
• Bright polished finish reduces friction and aids chip flow
• Right-hand cutting direction compatible with standard CNC and manual drill spindles

Compatibility

Designed as a precision replacement or production circuit board drill bit for CNC drilling equipment and precision drill presses that accept a 1/8-inch shank diameter collet or chuck. Verified material compatibility includes alloy steel, carbon steel, cast iron, high temperature alloy, stainless steel, and titanium.

Installation Notes

Circuit board drill bits at this diameter are typically installed and operated by machining technicians or PCB fabrication specialists. Ensure the spindle and collet are fully de-energized and at rest before bit changes. Verify collet size matches the 1/8-inch shank diameter before clamping to prevent runout. Carbide tooling is brittle at small diameters — avoid side loading, manual leverage, or impact during handling and installation.